OPTICAL SIGNAL RECEIVER Russian patent published in 2019 - IPC G01J1/04 G02B26/02 H01L31/232 

FIELD: optics.

SUBSTANCE: invention relates to reception of optical radiation and to a receiver of optical signals. Receiver includes a photosensitive element, a signal processing circuit and an optical gate mounted in front of the photosensitive element. Optical gate is made in the form of a shutter with two working positions. Device incorporates a shutter drive incorporating a flat spring closed in the form of a ring with diametrically opposite sides tightened by tensioning with a force determined by the specified speed of the shutter drive. Shutter is connected to the spring by means of a transfer link so that when changing the stretching length the shutter moves to the specified distance between the initial and working positions. Stretching is a current-conducting thread, to ends of which there is an external source of control electric signal, at supply of which tension is heated, and its length increases due to temperature expansion.

EFFECT: providing operability of the device under active and passive laser countermeasures with minimum dimensions and maximum sensitivity at low level of signals.

5 cl, 3 dwg